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COBOL, PROCEDURE_DIVISION, DISPLAY, 4format_arg_position_extensions
 *Conan The Librarian 

  When a Format 4 DISPLAY statement is specified, the value stored in
  arg-position is moved to argument-number. This updates the current
  argument position indicator for the command line. See ARGUMENT-NUMBER
  in the SPECIAL-NAMES paragraph. This point to to selected argument to
  be read by a Format 7 ACCEPT statement.

  Format 4 -

   DISPLAY arg-position UPON argument-number
      [ END-DISPLAY ]

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